DOCSLIB.ORG

Landscape-Level Feedbacks in the Demand for Transgenic Pesticidal Corn in T the Philippines ⁎ Zachary S

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Landscape-Level Feedbacks in the Demand for Transgenic Pesticidal Corn in T the Philippines ⁎ Zachary S Ecological Economics 180 (2021) 106883 Contents lists available at ScienceDirect Ecological Economics journal homepage: www.elsevier.com/locate/ecolecon Landscape-level feedbacks in the demand for transgenic pesticidal corn in T the Philippines ⁎ Zachary S. Browna,b, , Lawson Connorc, Roderick M. Rejesusa, Jose M. Yorobe Jrd a Department of Agricultural & Resource Economics, North Carolina State University, United States of America b Genetic Engineering & Society Center, North Carolina State University, United States of America c Department of Agricultural Economics and Agribusiness, Louisiana State University, United States of America d University of the Philippines at Los Baños, Philippines ARTICLE INFO ABSTRACT JEL codes: We introduce a novel econometric approach to estimate economic pest control feedbacks within agroecological C33 systems, using discrete choice endogenous sorting models. We apply this approach to deployment of transgenic C35 Bt maize in the Philippines. We show with basic theory how areawide pest suppression from largescale Bt maize C36 deployment attenuates farmers' demand for this technology. Econometric results support this hypothesis and D24 imply long-run demand for the Bt trait is price-inelastic, contrasting with price-elastic demand estimated from a Q12 model without feedback. Investigating whether this feedback truly derives from areawide pest suppression, we Q57 analyze farmers' pest infestation expectations and find expected damages are significantly reduced by higher Keywords: areawide Bt deployment. We discuss implications of these findings and other potential applications of the Agroecology econometric approach to study coupled biological and economic systems. Bioeconomic feedbacks Areawide pest suppression Crop choice Discrete choice models Endogenous sorting 1. Introduction genetic composition (e.g. pesticide resistance) of pest populations (Gould et al. 2018). Largescale agricultural production involves ecological feedbacks Theoretical and simulation-based models in biology and economics between farmer decisions, their effects on biological systems, and suggest that externalities resulting from such agroecological feedbacks economic reactions to these effects. The control of crop pests provides a would impact farmers' incentives and decisions to undertake pest con- particularly salient example. Credible estimates put global crop losses trol efforts (Milne et al. 2015; Epanchin-Niell and Wilen 2015). How- due to pests at roughly a quarter of potential yields (Oerke 2006; ever, no empirical research has yet investigated whether this is the case. Culliney 2014), with pest damages expected to increase with climate This is at least partly due to the difficulty of such an exercise. The change (Deutsch et al. 2018). Pest control choices strongly influence econometric measurement of such feedback loops would require lar- economic returns from crop production (Fernandez-Cornejo et al. 2014; gescale, landscape-level experiments or – barring these – some strategy Chambers et al. 2010). A growing body of entomological and weed to address endogeneity. Moreover, directly observing the interactions science research shows how these choices can impose externalities on between farmers and pest populations requires biological and economic neighboring farms, by altering landscape-level pest pressure (Hutchison data with enough detail and variation at both the farm and landscape et al., 2010; Wan et al. 2012; Dively et al. 2018),1 background presence scales. and movement of chemical pesticides (Werle et al. 2018), and the In this paper we introduce a novel approach to econometrically ⁎ Corresponding author at: 4310 Nelson Hall, 2801 Founders Drive, Raleigh, NC 27607, United States of America. E-mail address: [email protected] (Z.S. Brown). 1 Certain pest control choices (like use of transgenic Bt crops) not only alter landscape-level pest pressure for the primary (e.g., target) pest, but these choices can also alter landscape-level pest pressure for secondary (e.g., non-target) pests. For example, one would generally expect that landscape-level pest pressure for the primary pest would decrease with Bt corn and then landscape-level pest pressure for the secondary pest (not susceptible to the Bt toxin) may increase (Kuosmanen et al. 2006; Catarino et al. 2015). https://doi.org/10.1016/j.ecolecon.2020.106883 Received 31 December 2019; Received in revised form 6 October 2020; Accepted 7 October 2020 0921-8009/ © 2020 Elsevier B.V. All rights reserved. Z.S. Brown, et al. Ecological Economics 180 (2021) 106883 measure the effect of bioeconomic pest control feedbacks on agents' systems is the Asian corn borer (Ostrinia furnicalis, or ACB). Bt varieties choices, by using endogenous sorting models developed in the en- are also highly effective at suppressing ACB (Afidchao et al. 2013). vironmental, resource and urban economics literatures (Bayer and We first estimate an endogenous sorting model for Philippine maize Timmins 2007; Timmins and Murdock 2007; Hicks et al. 2012; farmers' decisions to deploy Bt versus non-Bt varieties, using a two- Bernasco et al. 2017).2 These tools have been specifically developed to stage fixed effects conditional logit and instrumental variables regres- measure how the choices of individual economic agents depend on the sion method originally developed by Bayer and Timmins (2007). The market-level, aggregate demand shares for discrete alternatives, and in results from our estimation confirm the prediction of our conceptual turn how these endogenous choices feed back into determining ag- model: Greater areawide adoption of Bt varieties appears to attenuate gregate demand. For example, demand for recreation areas is likely to individual demand for them. As noted above, in qualitive terms, the attenuate with increased congestion (Timmins and Murdock 2007). The endogeneity appears to generate price-inelastic long-run demand for key analogue we use here is the hypothesis, based on previous agroe- the Bt trait. To corroborate the bioeconomic explanation for this result, cological research, that demand for a specific pest control technology – we then econometrically analyze survey data on farmers' expectations genetically modified Bacillus thuringiensis (Bt) maize – should attenuate regarding ACB infestations, to see whether higher areawide Bt de- due to landscape-level pest pressure reductions induced by the tech- ployment leads farmers to expect fewer infestations. We find robust nology. evidence for this effect. The general identification strategy used in endogenous sorting The rest of the paper proceeds as follows: We first present a con- models is to observe variation in the effective choice set available ceptual model of pest suppression spillovers and feedbacks in the de- within each market. Such variation can be used to build an instrument mand for Bt maize, followed by a detailed description of our econo- that predicts variation in aggregate demand shares, but is exogenous metric approach. We then provide a description of the empirical context with respect to unobserved market-level factors that affect individual and the dataset used in the study, before discussing some econometric preferences and thereby aggregate demand. For example, recreation considerations (vis-a-vis our data). Estimation results are then pre- site openings or closures – or more generally changes in the relative sented and interpreted. We then discuss implications and limitations of costs of access or nonmonetary attributes – over time produces varia- our analysis. tion in the effective recreation choice set available at a given interval of time (Timmins and Murdock 2007). To the extent this variation is 2. Conceptual and Econometric Models exogenously determined (i.e. not itself a product of congestion), it can be used to infer how congestion attenuates demand. We first present a conceptual model of how we can expect area-level To apply this approach in measuring the bioeconomic pest control adoption of a pesticidal crop to determine pest densities (the bioeco- feedbacks, we first present a simple conceptual model showing how an nomic spillover), and in turn determine individual grower choices analogous feedback should manifest in the case of Bt maize, given about whether to adopt GM varieties. While our model makes a number reasonable – and testable – assumptions about agents' pest damage of simplifications, in the following section describing the study area, we expectations. In this model, greater areawide adoption of Bt maize re- argue that it characterizes well, the typical insect pest control en- duces landscape-level pest pressure, thereby reducing the incentive for vironment facing a Philippine maize farmer over the time period in our individual farmers in the area to deploy the control measure. One data. We then translate this conceptual model into an econometric practical consequence of recognizing this bioeconomic feedback is that approach, and describe the estimation procedure. the long-run, equilibrating price elasticity of demand for the pest con- trol measure should therefore be less than what would be erroneously 2.1. Conceptual Model implied by ignoring it. Our empirical estimates in fact suggest demand for the Bt trait switches from being price-elastic to inelastic when ac- Consider a farmer facing the ex ante binary choice of whether to counting for this endogeneity. plant one of two varieties of a crop: a conventional variety fully sus- Motivated by this theory, we then specify and estimate
Load more

Recommended publications
  • DESENVOLVIMENTO E SOBREVIVÊNCIA DE Euborellia Annulipes COM DIETA VEGETAL, ANIMAL E MISTA MAYSA PEREIRA TOMÉ
    DESENVOLVIMENTO E SOBREVIVÊNCIA DE Euborellia annulipes COM DIETA VEGETAL, ANIMAL E MISTA MAYSA PEREIRA TOMÉ UNIVERSIDADE ESTADUAL DA PARAÍBA CAMPINA GRANDE-PB FEVEREIRO DE 2018 DESENVOLVIMENTO E SOBREVIVÊNCIA DE Euborellia annulipes COM DIETA VEGETAL, ANIMAL E MISTA MAYSA PEREIRA TOMÉ Dissertação apresentada ao Programa de Pós-Graduação em Ciências Agrárias da Universidade Estadual da Paraíba / Embrapa Algodão, como parte das exigências para obtenção do título de Mestre em Ciências Agrárias / Área de Concentração: Agricultura familiar e sustentabilidade. Orientador: Prof. Dr. Carlos Alberto Domingues da Silva UNIVERSIDADE ESTADUAL DA PARAÍBA CAMPINA GRANDE-PB FEVEREIRO DE 2018 ii AGRADECIMENTOS A Deus por ter estado comigo em todos os momentos da vida. A Ele toda honra e toda minha gratidão! Aos meus pais, Genilda e “Mayca”, por investirem nos meus sonhos e por acreditarem em mim até quando eu mesma duvidei. Nunca terei como retribuir tamanho amor. Vocês são os melhores pais que Deus poderia ter me dado. Ao meu orientador, Carlos Alberto Domingues da Silva, pela amizade, profissionalismo, dedicação, paciência, ensinamentos e auxílio na confecção desta dissertação. À Embrapa Algodão, por disponibilizar sua infraestrutura e assim possibilitar o desenvolvimento dessa pesquisa. À UEPB e ao PPGCA, pelas condições oferecidas para realização do mestrado em Ciências Agrárias. Às professoras da UEPB, Élida Corrêa pela orientação no estágio de docência e participação na banca examinadora; e a Avany Gusmão pela contribuição externa ao nosso trabalho. À Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES), pela concessão da bolsa. Aos técnicos do laboratório de Entomologia, Airton, Antônio e Eduardo pelos momentos de alegria e descontração, companheirismo e experiência compartilhada.
    [Show full text]
  • LỜI CAM ĐOAN Tôi Xin Cam Đoan Rằng, Đây Là Đề Tài Nghiên Cứu
    i LỜI CAM ĐOAN Tôi xin cam đoan rằng, đây là đề tài nghiên cứu của riêng tôi. Các số liệu, kết quả nghiên cứu là hoàn toàn trung thực. Tôi xin cam đoan rằng mọi sự giúp đỡ cho việc thực hiện luận văn đã được cảm ơn và các thông tin trích dẫn trong luận văn này đều đã được chỉ rõ nguồn gốc. Huế, tháng 07 năm 2016 Tác giả Hoàng Văn Sỵ ii LỜI CẢM ƠN Trong suốt quá trình thực tập và hoàn thành luận văn tốt nghiệp, ngoài sự say mê, cố gắng nỗ lực của bản thân, tôi đã nhận được sự hướng dẫn, quan tâm và giúp đỡ tận tình của các thầy cô giáo, gia đình và bạn bè. Qua đây tôi xin gửi lời cảm ơn chân thành đến Ban giám hiệu nhà trường Đại học Nông Lâm Huế, phòng Đào tạo sau Đại học đã tạo mọi điều kiện tốt nhất cho tôi trong suốt thời gian học tập tại trường. Đặc biệt tôi xin bày tỏ lòng biết ơn sâu sắc đến thầy PGS.TS Trần Đăng Hòa, người dẫn dắt, chỉ lối cho tôi có những ý tưởng mới, rèn luyện được tính chủ động, năng động và sáng tạo trong công việc. Thầy luôn quan tâm, động viên tôi những lúc khó khăn và hướng dẫn tận tình cho tôi trong suốt quá trình học tập, thời gian thực tập để tôi có thể hoàn thành tốt luận văn tốt nghiệp này. Qua đây tôi cũng muốn nói lời cảm ơn các thầy cô giáo trong Bộ môn Bảo vệ thực vật, trong Khoa Nông học đã đã tận tình giảng dạy, truyền đạt kiến thức, kinh nghiệm cho tôi trong suốt thời gian học tập và thực tập.
    [Show full text]
  • Use of Predatory Earwigs to Suppress Asian Corn Borer
    Practical Plant protection F F T C Technology PT2005-4 Use of predatory earwigs to suppress Asian corn borer nsect pest infestation is one of the yield-reducing which has been comprehensively studied, particularly its Ifactors in corn production. There are more than 50 biology, predatory consumption, and field abundance species of insects recorded feeding on corn and (Fig. 2). attacking at all growth stages of the plants. It is therefore necessary for corn growers to be able to Effectiveness recognize at least the more important insect pests for them to decide on the appropriate management to Researchers of the University of the Philippines Los reduce the pest population below damaging levels. Baños (UPLB) used different release regimens at one One of the most destructive pests of corn is the earwig per square meter, in tandem with detasseling or Asian corn borer (ACB) (Ostrinia furnacalis Guenee). microbial application, to test the effectiveness of earwigs Control of ACB is a major concern of corn growers, in suppressing ACB infestation. most especially sweet corn growers. ACB infestation The augmentative releases of earwigs (Fig. 3) reduces potential yield by an average of 52%. effectively controlled the ACB infestation in corn. In One major control strategy is to apply chemical both small- and large-scale field evaluations of green insecticides. However, the continuous application of corn varieties, the interventions of earwig releases insecticides has resulted in insect resistance, hence, increased the corn yield by as high as 40%. With the use the need to identify potential natural enemies as of earwigs, cost of production was reduced by 8% and control measures.
    [Show full text]
  • Morphological and Molecular Analysis of Australian Earwigs (Dermaptera) Points to Unique Species and Regional Endemism in the Anisolabididae Family
    insects Article Morphological and Molecular Analysis of Australian Earwigs (Dermaptera) Points to Unique Species and Regional Endemism in the Anisolabididae Family Oliver P. Stuart 1 , Matthew Binns 1,2, Paul A. Umina 1,3, Joanne Holloway 4 , Dustin Severtson 5, Michael Nash 6,7 , Thomas Heddle 8 , Maarten van Helden 6,8 and Ary A. Hoffmann 1,* 1 School of BioSciences, Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, Victoria 3052, Australia; [email protected] (O.P.S.); [email protected] (M.B.); [email protected] (P.A.U.) 2 Agriculture and Food Business Unit, Commonwealth Scientific and Industrial Research Organisation, Black Mountain, Australian Capital Territory 2601, Australia 3 Cesar, 293 Royal Parade, Parkville, Victoria 3052, Australia 4 New South Wales Department of Primary Industries, Wagga Wagga Agricultural Institute, Pine Gully Road, Charles Sturt University, New South Wales 2795, Australia; [email protected] 5 Department of Primary Industries and Regional Development, South Perth, Western Australia 6151, Australia; [email protected] 6 School of Agriculture, Food and Wine, the University of Adelaide, Urrbrae, South Australia 5064, Australia; [email protected] (M.N.); [email protected] (M.v.H.) 7 School of Life Science, College of Science, Health and Engineering, La Trobe University, Bundoora, Victoria 3086, Australia 8 South Australian Research and Development Institute, Entomology, Waite Road, Waite, Urrbrae, South Australia 5064, Australia; [email protected] * Correspondence: [email protected] Received: 1 February 2019; Accepted: 7 March 2019; Published: 14 March 2019 Abstract: Dermaptera (earwigs) from the Anisolabididae family may be important for pest control but their taxonomy and status in Australia is poorly studied.
    [Show full text]
  • Egg Database Bibliography
    Egg Database Bibliography Samuel H. Church1;∗;y, Seth Donoughe1;2;∗, Bruno A. S. de Medeiros1, Cassandra G. Extavour1;3;y Note: This document is a list of the 1,756 published sources that were used to generate the assembled dataset of insect egg traits. ‘Diss.’ indicates a PhD dissertation, whereas ‘MA thesis’ indicates a Master’s thesis. For more information on the dataset, please see Church et al. 2018: “A database of egg size and shape from more than 6,700 insect species” (preprint). It describes the criteria that were used to include sources, definitions of each trait, and details on the procedure that was used to collect data from each source. References Abbassy, M. M., N. Helmy, M. Osman, S. E. Cope, and S. M. Presley. “Embryogenesis of the sand fly Phlebotomus pa- patasi (Diptera: Psychodidae): cell cleavage, blastoderm formation, and gastrulation”. Annals of the Entomological Society of America 88.6 (1995): 809–814. Abdel-Razak, S. I., S. M. Beshr, A. K. Mourad, and K. S. Moursi. “Ultrastructure of egg shell of four different Coccoidea species in Egypt”. Communications in Agricultural and Applied Biological Sciences 73.3 (2007): 521– 527. Abdurahiman, U. C. and K. J. Joseph. “Observations on the biology and behaviour of Ceratosolen marchali Mayr (Agaonidae, Chalcidoidea, Hymenoptera)”. Entomon 1.2 (1976): 115–122. Abraham, Y. J., D. Moore, and G. Godwin. “Rearing and aspects of biology of Cephalonomia stephanoderis and Prorops nasuta (Hymenoptera: Bethylidae) parasitoids of the coffee berry borer, Hypothenemus hampei (Coleoptera: Scolytidae)”. Bulletin of Entomological Research 80.2 (1990): 121–128. Adamski, D., J.
    [Show full text]
  • Maize Pest Status and Their Natural Enemies in Maize Production Area of Donggala, Central Sulawesi, Indonesia
    Maize Pest Status and Their Natural Enemies in Maize Production Area of Donggala, Central Sulawesi, Indonesia AsniArdjanhar,Amran Muis and Nurnina Nonci Assessment Institute for Agricultural Technology (AIAT), Central Sulawesi, Indonesia. *E-mail: [email protected] Abstract. This experiment was aimed at understanding the species composition and status of maize pests in Donggala district of Central Sulawesi province in Indonesia in order to identify an appropriate control strartegy and make location-specific IPM recommendations. Observations were recorded in seven villages in three subdistricts on 0.5-1 ha plots of farmers !"#$%& & $ The results showed that the maize pests found in Donggala were almost the same as elsewhere in terms of structure, infection and distribution. The most important of the maize insect pests were Ostrinia furnacalis Guenee, Helicoverpa armigera Boddie and Atherigana sp. The second rung of important pests were Dalbulus maidis Delong and Walcott, Rhopalosiphum maidis Fitch and Nezara viridula L. Another pest, Nicentrites testaceipes, was also found in high numbers. The other maize pests found were not important. These were Spodoptera litura F., Plusia calsites Esp., Lamprosema indicata F., Locusta migratoria and Valanga sp. Their natural enemies were predators and parasites. There were 12 species of predators found in our survey: Menochilus sexmaculatus, Scymnus sp, Epilachna sp, Coccinella transversali, Ophinea sp, Rodolia, Chrysopa, Euborellia annulata and Lycosa pseudoannulata. One species of larval parasite was found from the order/family Hymenoptera/Ichneumonidae. We also found that egg parasites were more effective in controlling O. furnacalis population compared with larval parasites. The percentage of egg mass of O. furnacalis parasited was 96% in all locations.
    [Show full text]
  • 296. Jurnal Online Agroekoteknologi Vol.1, No.2, Maret 2013 ISSN No
    296. Jurnal Online Agroekoteknologi Vol.1, No.2, Maret 2013 ISSN No. 2337- 6597 DAYA PREDASI CECOPET (Forficula auricularia) (Dermaptera : Nisolabididae) PADA BERBAGAI INSTAR LARVA ULAT GRAYAK (Spodoptera litura F.) (Lepidoptera : Noctuidae) DI LABORATORIUM Yasir Arobi1*, Syahrial Oemry2, dan Fatimah Zahara2 1Alumnus Program Studi Agroekoteknologi, Fakultas Pertanian USU Medan 20155 2Program Studi Agroekoteknologi, Fakultas Pertanian USU Medan 20155 *Corresponding author : E-mail: [email protected] ABSTRACT The Ability of Cecopet (Forficula auricularia) (Dermaptera: Nisolabididae) on some Instar of Spodoptera litura F. (Lepidoptera: Noctuidae) in the Laboratory. The objective was to study the ability of Cecopet (F. auricularia) on some instar of S. litura. The research conducted at the Insect Laboratory, Faculty of Agriculture, University of Sumatera Utara, Medan, from Agustus to September 2012. The method of this research was Randomized Complete Design Non Factorial with eight treatments (control with 2st and 4th instar, 2 males cecopet, 2 female cecopet, a pair on 10 larvae 2nd and 4th instar/stoples) with three replications.The results showed that the highest percentage of mortality was C2 (2 female cecopet on 10 larvae/ stoples) is 96,67% and the lowest th was C02 (control with 4 instar) is 0%. Keywords : Forficula auricularia, Spodoptera litura, mortality ABSTRAK Daya Predasi Cecopet (Forficula auricularia) (Dermaptera : Nisolabididae) pada Berbagai Instar Larva Ulat Grayak (Spodoptera litura F.) (Lepidoptera : Noctuidae) di Laboratorium. Penelitian bertujuan untuk mengetahui daya predasi cecopet (Forficula auricularia) terhadap beberapa instar ulat grayak (Spodoptera litura F.) (Lepidoptera : Noctuidae) di Laboratorium. Penelitian dilakukan pada bulan Agustus sampai September 2012 di Laboratorium Hama Fakultas Pertanian Universitas Sumatera Utara, Medan.
    [Show full text]
  • Euborellia Annulata)
    BiologyIndonesian and Journalintrinsic of growth Agricultural rate of Scienceearwig (Euborellia6(2), 2005: annulata) 69-74 69 BIOLOGY AND INTRINSIC GROWTH RATE OF EARWIG (Euborellia annulata) Nurnina Nonci Indonesian Cereals Research Institute, Jalan Dr. Ratulangi PO Box 173, Maros 90514, Indonesia ABSTRACT Philippines and Malaysia, yield loss due to the pest has been reported up to 80-90% (Hussein 1986; Teng et al. Earwig (Euborellia annulata) is a potential predator of corn borer (Ostrinia furnacalis), one of the most important pests of 1992; Nonci 2004). Corn borer is found almost in every corn. To include the use of predator in integrated pest corn plantation in South Sulawesi (Nonci 2004). The management (IPM) to control the pest, it is necessary to pest is commonly controled by using insecticides understand the basic information of the predator. This study because plant resistant is limited (CABI 2004). aimed to know biology and intrinsic growth rate of the predator Increasing awareness on the environmental problems feed on an artificial media (dog food). Ten pairs of newly due to insecticides, it is necessary to reduce the use of emerging adults of the predator were placed in a small plastic container containing a mixture of soil and sand (1:1 v/v) insecticides for controlling pests. One of potential supplemented with an artificial food. The average temperature control methods of the corn borer is using predator and relative humidity during the study were kept at 27.9-30.3oC such earwig (Euborellia annulata). E. annulata is one and 76.7-92.3%, respectively. The biological aspects of the of effective predators of O.
    [Show full text]
  • Reproductive Biology and Nymphal Development in the Basal Earwig
    Entomologische Abhandlungen 62 (2): 99–116 © Museum für Tierkunde Dresden, ISSN 0373-8981, 28.07.2005 Reproductive Biology and Nymphal Development in the Basal Earwig Tagalina papua (Insecta: Dermaptera: Pygidicranidae), with a Comparison of Brood Care in Dermaptera and Embioptera DANILO MATZKE 1 & KLAUS-DIETER KLASS 2 1 Stöckelstrasse 19, 04347 Leipzig, Germany [[email protected]] – 2 Staatliche Naturhistorische Sammlungen Dresden, Museum für Tierkunde, Königsbrücker Landstrasse 159, 01109 Dresden, Germany [[email protected]] Abstract. Based on breeding cultures various behaviours, reproductive biology including maternal brood care, and nymphal development were studied in the basal dermapteran Tagalina papua de Bormans, 1903 (Pygidicranidae s.str.). Supplementary observations were made on T. burri Hincks, 1955, Paracranopygia siamensis (Dohrn, 1863) (Pygidicranidae s.str.), and an unidentified species of Diplatyidae. T. papua specimens did not display any courtship behaviour. In egg deposition gonapophyses VIII are used as a guiding device for the proper placement and upright positioning of the eggs. Eggs are fixed to the substrate in Tagalina, Paracranopygia, and the diplatyid, probably using secretions from the true accessory (colleterial) glands, which have been retained in most basal Dermaptera. Consequently, eggs cannot be transported and piled up, which in other Dermaptera is an important component of brood care. Brood care in T. papua consists in the association with and defense of eggs and 1st instar nymphs and the occasional control of the eggs by the mouth parts, but no egg cleaning was observed. Brood care is thus less ela- borate than in all examined higher Forficulina. Arguments are provided why this simple pattern is plesiomorphic for Dermaptera.
    [Show full text]
  • Arthropod Natural Enemies of Helicoverpa Armigera (Hiibner) (Lepidoptera: Noctuidae) in India
    Biocontroi Science and Technology (1996) 6, 481-508 REVIEW Arthropod Natural Enemies of Helicoverpa armigera (Hiibner) (Lepidoptera: Noctuidae) in India J. ROMEIS AND T. G. SHANOWER Crop Protection Division, International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru, Andhra Pradesh 502 324, India (Kerer\,edfr,r ~~uhliccrl~on16 Nol'emh~r 1995: ret'lred manuscript accepred 27 Ma) 1996) Helicoverpa armigera (Hiibner) (Lepidoptera: Noctuidae) is one of the most serious insect pests in the Old World. In India, it causes substantial losses to legume, fibre, cereal oilseed and vegetable crops. This paper reviews the literature on the biology, ecology, eflcaqy, rearing and augmentation of endemic para.sitoids and predators, as well us exotic parasitoids introduced and releused in India. It also provides updated lists of H. annigera natural enemies native to India. In addition, reports of augmentative releases of Trichogramma spp., the most extensive1.v studied rlatural enemy qf H. armigera are .summarized. Keywords: Helicoverpa armigera, natural enemies, biological control, India INTRODUCTION Helir.over]la armigera (Hiibner) (Lepidoptera: Noctuidae) is one of the most serious insect pests in the Old World. It is widely distributed from the Cape Verde Islands in the Atlantic Ocean, through Africa, Asia and Australia to the South Pacific islands and from southern Europe to New Zealand (Reed & Pawar, 1982). In India, H. armigera has been recorded on at least 181 plant species from 45 plant families (Manjunath et al., 1989), including major crops such as cotton (Go.~svpiumspp.), sorghum (Sorghum bicolor Linnaeus), tomato (Lycopersicon esculentum Mill.), pigeonpea (Cajanus cajan (Linnaeus) Millspaugh) and chickpea (Cicer arietinum Lin- naeus).
    [Show full text]
  • Economicsbtcotton.Pdf
    Greenpeace Report: The Economics of Bt Corn: Whose interest does it really serve? EXECUTIVE SUMMARY Bt Corn in the Philippines was designed to be resistant to the Asiatic Corn Borer (ACB), Ostrinia furnacalis (Guenee), one of the most destructive corn pests in the Philippines. It is also presented as a 'golden opportunity', a practical and ecologically sustainable solution for poor corn farmers everywhere to increase their yields, thus improving their livelihoods and alleviating poverty. These claims are misleading. There are safer and more viable options in solving the corn borer woes of our corn farmers. Bt corn is definitely not a biological means of controlling pests and it is not ecologically sustainable. DOES IT HAVE TO BE BT CORN? (OR BT CORN IS NOT THE BEST OPTION) Genetically Engineered Organisms are unpredictable. When released into the environment they produce unexpected results that could prove damaging in the long term. However, there are quite a number of readily available, cost effective and practical non-GE options that can beat the corn borer without having to resort these crops. Synchronized planting by farmers with adjacent farms is the most common method used to avoid heavy corn borer attacks per farm. They also recommend planting corn as the main crop during the dry season as more severe infestation usually occurs during the rainy or wet season (July to September). Detasselling of corn has also been proven to be effective against heavy corn borer attacks. The tassel is the corn borer's primary food source, and taking out 75% of the tassel per field will reduce tremendously the number of larvae that reaches molting when they start boring holes into the corn stem.
    [Show full text]
  • Bureau of Sugar Experiment Stations, Brisbane
    1 DOSSIERS ON SESAMIA SPECIES AS PESTS OF SUGARCANE Sesamia Guenée Sesamia Guenée 1852, 95. Type species: Cossus nonagrioides Lefebvre, by monotypy. Adults Tams and Bowden (1953) give extensive descriptions of both the male and female adults of the African species. The Oriental and New Guinea species do not appear to have been incorporated in any useful key. Key to adults of Sesamia (African species based on Tams & Bowden 1953 and Holloway 1998) 1 Tympanal organ on first sternite of abdomen; proboscis scaled ...................................................... ...................................................... Pyraloidea (Chilo, Diatraea, Eldana, Eoreumia, Scirpophaga) - Tympanal organ in metathorax; proboscis unscaled .................................................. Noctuidae 2 2(1) Bathyrichia - ................................................................................................................................... Sesamia 3 3(2) Antennae of male simple; male genitalia with the valve entire, juxta small, with a small medial process and the manica spinose; female genitalia with the ostium strongly transverse, bursa copulatrix pointed at apex, ductus bursae short and broad .................................................. cretica - Antennae of male bipectinate or serrate for more than half length of the antennal shaft; male genitalia with the sacculus and cucullus of valve separate, sacculus with an apical sclerotised process, juxta simple, manica usually membranous; female genitalia with the ostium not strongly transverse,
    [Show full text]